CN103485329A - Horizontal high-pressure powder spraying construction method for water-affluent silty-fine sand stratum and machine tool used for construction method - Google Patents
Horizontal high-pressure powder spraying construction method for water-affluent silty-fine sand stratum and machine tool used for construction method Download PDFInfo
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- CN103485329A CN103485329A CN201310473836.9A CN201310473836A CN103485329A CN 103485329 A CN103485329 A CN 103485329A CN 201310473836 A CN201310473836 A CN 201310473836A CN 103485329 A CN103485329 A CN 103485329A
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Abstract
The invention provides a horizontal high-pressure powder spraying construction method for a water-affluent silty-fine sand stratum and a machine tool used for the construction method. The horizontal high-pressure powder spraying construction method and the machine tool are suitable for the water-affluent silty-fine sand stratum in the construction of reinforcing an underground construction. The horizontal high-pressure powder spraying construction method for the water-affluent silty-fine sand stratum and the machine tool used for the construction method are characterized in that a guide hole is drilled through a horizontal directional drilling machine, a drilling rod is withdrawn in a rotary mode after the guide hole is drilled to a designed length, powder spraying materials are sprayed into the water-affluent silty-fine sand stratum in a powder body through 20-25Mpa high-pressure gas while the drilling rod is withdrawn, and the sprayed powder is forcedly mixed with the water-affluent silty-fine sand stratum, absorbs water in the stratum and reacts with the water, and is finally solidified to form a horizontal cylindrical solid, namely a horizontal powder spraying pile. The horizontal powder spraying piles are mutually occluded to form a powder spraying curtain at the top of a tunnel as concentric circles, and the phenomenon of collapse at the top is prevented. The process is relatively low in cost, excess water in the stratum can be effectively absorbed, and a reinforcing effect is good.
Description
Technical field
The present invention relates to the plant of the horizontal high pressure powder spray engineering method in rich pigment fine sand stratum and use thereof, be applicable to reinforce the high-moisture powder fine sand stratum run in underground engineering construction.
Background technology
The rich pigment fine sand layer often run in underground engineering construction, because the little water content of this formation pore is high, plain particles type slurry infiltration is difficulty very, and the Polymer Solution price is too high, so do not find the reinforcement means that cost performance is higher always.The horizontal jet grouting technique that latest domestic is risen is reinforced and is had certain effect fine sand layer, but, for the rich pigment fine sand layer of high-moisture percentage, because stratum absorbs difficulty to slurries, or easily spillage occurs, the harmful effects such as protuberance.
Summary of the invention
The problem existed for above-mentioned prior art, the invention provides a kind of rich pigment fine sand powder stratum high press-powder pressure spray process method, carry out horizontal drilling with horizontal directional drilling machine, then by gases at high pressure, powder is sprayed to material and be ejected in rich pigment fine sand stratum with the powder form.The powder ejected and rich pigment fine sand layer Forced Mixing, and the moisture content absorbed in stratum reacts with it, finally solidify to form horizontal circle column induration, prevents the phenomenon of caving at top.Specifically comprise the steps:
(1) preparation of construction: the plant of marching into the arena is assembled and debugged, metering device is demarcated, check that whether material is up to specification;
(2) location: press design drawing, the Powder-jet Pile position is made with steel ruler in scene, and the stake bit error of every pile must not be greater than 2cm, and facility move to the stake position and locate and make drill bit over against stake position central point;
(3) boring: start air compressor machine and supply gas, rig forward horizontal drilling, stop creeping into when controlling after drill bit arrives design stake end absolute altitude;
(4) high press-powder spray: rig rotates backward, and starts powder transmitter powder feeding spray material, after powder spray material is delivered to spout, withdraws drill bit again, dusts in limit, and stir on limit, and limit withdraws, and rich pigment fine sand and powder spray material are fully mixed; When drill bit withdraws distance face 20～30cm, stop spraying powder in hole, pile finishes; Close High-Pressure Compressor, rig master motor stopping;
(5) rig displacement, repeat said process and carry out next one stake position construction.
The mixture that described powder spray material is Portland cement and quicklime, and add the aluminate class accelerating admixture, the mass ratio of portland cement and quicklime is 2:1～3:1, the accelerating admixture addition is cement quality 1～3%.
Described aluminate class accelerating admixture is sodium aluminate or potassium aluminate.
Described step (4) mesohigh air compressor provides pressure and powder spray pressure to be 20～25MPa.
Material described in step (1) comprises cement and quicklime.
The present invention also provides a kind of plant used in the horizontal high pressure powder spray in rich pigment fine sand stratum engineering method, described plant comprises horizontal directional drilling machine, powder transmitter, gasholder, High-Pressure Compressor, wherein High-Pressure Compressor is connected with gasholder, the gas vent of gasholder is connected with the gas access of powder transmitter, and the spout of powder transmitter is connected with the powder entrance of horizontal directional drilling machine.
The present invention is applicable to reinforce the high-moisture powder fine sand stratum run in underground engineering construction, by adopting horizontal directional drilling machine to set guide hole, after guide hole sets design length, rotation withdraws drilling rod, when withdrawing drilling rod, with the gases at high pressure of 20-25MPa, powder is sprayed to material and be ejected in rich pigment fine sand stratum with the powder form.The powder ejected and rich pigment fine sand layer Forced Mixing, and the moisture content that absorbs water-rich sand layer reacts with it, finally solidify to form horizontal circle column induration, i.e. horizontal powder spray piling.The mutual interlock of this horizontal powder spray piling also forms powder spray curtain with concentrically ringed form at tunnel top, reaches the purpose to stratum consolidation, prevents the phenomenon of caving at top.The grain diameter that forms of dusting is more tiny, spray more even, can significantly promote assimilation effect, the method can reduce unnecessary slurries and the pressure that horizontal jet grouting produces simultaneously, avoid occurring the phenomenons such as spillage and surface uplift, whole process costs is lower, and effectively absorbs the stratum excessive moisture, and consolidation effect is good.
The accompanying drawing explanation
Fig. 1 is the horizontal high pressure powder spray in rich pigment fine sand stratum engineering method flow chart.
Fig. 2 is that plant is arranged schematic diagram
Fig. 3 is tunnel internal powder spraying construction operation schematic diagram
Fig. 4 is the powder spray piling distribution map
Reference numeral: 1-horizontal directional drilling machine, 2-powder transmitter, 3-gasholder, 4-High-Pressure Compressor.
The specific embodiment
Below in conjunction with accompanying drawing, the invention will be further described.
As shown in Figure 1, the horizontal high pressure powder spray in rich pigment fine sand stratum engineering method comprises the steps:
The first step, preparation of construction:
(1) job site is equipped with various metering Instrument equipments, carries out the staking-out work of metering device.
(2) on-the-spot raw material are tested and preparation, powder spray material be take cement and quicklime as main material and is added the sodium aluminate accelerating admixture, and addition is cement quality 1.5%.
(3) plant of marching into the arena is assembled and debugged, guaranteed that facility meet construction requirement.
Second step, location: draw a bit plane arrangement diagram according to construction drawing, make at the construction field (site) the stake position of every powder spray piling with steel ruler, and carry out mark, the stake bit error of every pile must not be greater than 2cm.Then facility being moved to the stake position locates and makes drill bit over against stake position central point.
Carry out repetition measurement work in construction afterwards, answer running check stake position to mark whether to be moved, guarantee the accuracy of Powder-jet Pile position.
The 3rd step, boring: start air compressor machine and supply gas, rig forward horizontal drilling.When controlling after drill bit arrives design stake end absolute altitude, stop creeping into.
The 4th step, the spray of high press-powder: rig rotates backward, and starts powder feeding spray material, after powder spray material is delivered to ash spraying port, withdraws drill bit again, the capacity of spray coating shown according to electronic weighing device is regulated buncher, dusts in limit, and stir on limit, limit withdraws, and rich pigment fine sand and powder spray material are fully mixed.When drill bit withdraws distance face 20～30cm, stop spraying powder spray material in hole, pile finishes.Close air compressor machine, all pipeline pressures that dissipate, rig master motor stopping.
The 5th step, rig displacement, repeat said process and carry out next one stake position construction.
As shown in Figure 2, the plant used in the horizontal high pressure powder spray in rich pigment fine sand stratum engineering method, comprise horizontal directional drilling machine 1, powder transmitter 2, gasholder 3, High-Pressure Compressor 4, wherein High-Pressure Compressor is connected with gasholder, the gas vent of gasholder is connected with the gas access of powder transmitter, and the spout of powder transmitter is connected with the powder entrance of horizontal directional drilling machine.
As shown in Figure 3,4, horizontal directional drilling machine is placed on the scaffold of job site, and makes drill bit over against stake position central point, starts air compressor machine and supplies gas, and rig forward horizontal drilling, stop creeping into when controlling after drill bit arrives design stake end absolute altitude; Rig rotates backward, and starts powder transmitter powder feeding spray material, after powder spray material is delivered to spout, withdraws drill bit again, dusts in limit, and stir on limit, and limit withdraws, and rich pigment fine sand and powder spray material are fully mixed; When drill bit withdraws distance face 20～30cm, stop spraying powder in hole, pile finishes; Close High-Pressure Compressor, rig master motor stopping; Repeat said process and carry out next one stake position construction.
Claims (6)
1. the horizontal high pressure powder in rich pigment fine sand stratum sprays engineering method, it is characterized in that comprising following steps:
(1) preparation of construction: the plant of marching into the arena is assembled and debugged, metering device is demarcated, check that whether material is up to specification;
(2) location: press design drawing, the Powder-jet Pile position is made with steel ruler in scene, and the stake bit error of every pile must not be greater than 2cm, and facility move to the stake position and locate and make drill bit over against stake position central point;
(3) boring: start air compressor machine and supply gas, rig forward horizontal drilling, stop creeping into when controlling after drill bit arrives design stake end absolute altitude;
(4) high press-powder spray: rig rotates backward, and starts powder transmitter powder feeding spray material, after powder spray material is delivered to spout, withdraws drill bit again, dusts in limit, and stir on limit, and limit withdraws, and rich pigment fine sand and powder spray material are fully mixed; When drill bit withdraws distance face 20～30cm, stop spraying powder in hole, pile finishes; Close High-Pressure Compressor, rig master motor stopping;
(5) rig displacement, repeat said process and carry out next one stake position construction.
2. the horizontal high pressure powder in rich pigment fine sand according to claim 1 stratum sprays engineering method, it is characterized in that, the mixture that powder spray material is Portland cement and quicklime, and interpolation aluminate class accelerating admixture, the mass ratio of portland cement and quicklime is 2:1～3:1, and the accelerating admixture addition is cement quality 1～3%.
3. the horizontal high pressure powder spray in rich pigment fine sand according to claim 2 stratum engineering method, is characterized in that, the aluminate class accelerating admixture is sodium aluminate or potassium aluminate.
4. the horizontal high pressure powder spray in rich pigment fine sand according to claim 1 stratum engineering method, is characterized in that, step (4) mesohigh air compressor provides pressure and powder spray pressure to be 20～25MPa.
5. the horizontal high pressure powder spray in rich pigment fine sand according to claim 1 stratum engineering method, is characterized in that, the material described in step (1) comprises cement and quicklime.
6. the plant used in the horizontal high pressure powder in rich pigment fine sand claimed in claim 1 stratum spray engineering method, it is characterized in that, described plant comprises horizontal directional drilling machine, powder transmitter, gasholder, High-Pressure Compressor, wherein High-Pressure Compressor is connected with gasholder, the gas vent of gasholder is connected with the gas access of powder transmitter, and the spout of powder transmitter is connected with the powder entrance of horizontal directional drilling machine.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105350516A (en) * | 2015-09-29 | 2016-02-24 | 李翔宇 | Method for modifying and reinforcing rock and soil layer by injecting materials |
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| JP2011231467A (en) * | 2010-04-23 | 2011-11-17 | Onoda Chemico Co Ltd | Soil improvement construction machine |
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- 2013-10-12 CN CN201310473836.9A patent/CN103485329A/en active Pending
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| CN1986974A (en) * | 2006-12-22 | 2007-06-27 | 上海市基础工程公司 | Pressure reducing horizontal reinforcing process for soft soil layer |
| KR20090094734A (en) * | 2008-03-03 | 2009-09-08 | 주식회사 세이프씨앤이 | The method of wall stability by extension of bond diameter |
| CN101787693A (en) * | 2010-03-22 | 2010-07-28 | 中冶建筑研究总院有限公司 | High pressure powder-spray nozzle for high pressure powder spray method |
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| CN105350516A (en) * | 2015-09-29 | 2016-02-24 | 李翔宇 | Method for modifying and reinforcing rock and soil layer by injecting materials |
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Application publication date: 20140101 |